The EU’s anti-terror chief warned Europe on Monday to remain on its guard, especially against the threat of European jihadists who are finding new safe havens from Syria to Mali.

Gilles de Kerchove, marking a day of remembrance for victims of terror, said the threat remained real whether “it stems from terrorist organisations or lone actors.” Recent successes against Al-Qaeda and associated groups, such as in Mali after the French intervention there in January, were positive, Kerchove said in a statement. “But we know that terrorists are constantly seeking out new safe havens where they have space to operate, taking advantage of conflict situations,” he said.